LIVE · 30s
BTC / USD$104,820
Block950,344
Mempool12,480 tx
Sats / $954
Halving~692 d
21M minted94.9%
ETF AUM
§ Today's reading · live

If you set aside $100 this morning — how much of Bitcoin does that buy, right now?

What does one ounce of gold trade for, in fractions of a Bitcoin?

How long until the next halving — and what does the block subsidy become?

How much of the 21 million has been mined — and how much is left to find?

sats
BTC for 1 oz gold
days to halving
of 21M mined
60-min · last sample 12s ago+1.84% / 24h
§ Term of the day Walletsoftware or hardware that manages your private keys — the bitcoin lives on the blockchain; the wallet just proves it's yours. Private keya secret 256-bit number that controls your bitcoin; anyone who knows it can move the funds, so it must stay secret. Public keya key derived from your private key that can be shared openly — addresses come from it, but it can't be reversed. Addressa shareable string others send bitcoin to — like an email address for payments; safe to post. Seed phrase12 or 24 words (BIP 39) that back up your whole wallet — store it offline; anyone with it can restore your funds. Self-custodyholding your own bitcoin where only you control the keys — no exchange or government can freeze or seize it. Cold storagekeeping private keys entirely offline — the most secure way to hold bitcoin long-term. Satsthe smallest unit — 1 BTC = 100,000,000 sats. The unit that survives a six-figure price. Blocka bundle of transactions added to the blockchain roughly every 10 minutes. Blockchaina distributed, append-only ledger of every transaction — anyone can verify it, no one can quietly rewrite it. Miningusing computational energy to add blocks and earn new bitcoin — the process that secures the network. Proof of Workthe rule Bitcoin uses to agree on history — miners spend real energy, making attacks costly but verification trivial. Halvingevery 210,000 blocks (~4 years) the block reward is cut in half — enforcing the 21-million cap. Confirmationa block mined on top of your transaction — six (~1 hour) is the classic 'practically irreversible' threshold. Feea small sat/vByte payment to miners to include your transaction; higher fee, faster confirmation. Mempooleach node's waiting area for valid-but-unconfirmed transactions; miners pick from it, usually highest-fee first. UTXOUnspent Transaction Output — Bitcoin tracks discrete unspent chunks, not balances; these are what you spend. Nodea computer running Bitcoin that validates every rule itself — more nodes means a more decentralized network. Hash ratethe total computing power securing the network — higher means more expensive to attack. Lightning Networka Layer 2 on top of Bitcoin for near-instant, low-fee payments that settle back to the main chain. All 80 terms →

§ IFive departments

click any to exploreindependent · solo · curated, not endorsed

§ IIAt a glance

today's tabular readings · connecting…

Market

BTC / USD
BTC · YTD
Gold · YTD
S&P 500 · YTD
$100 → sats
1 oz gold → BTC
BTC : Gold mcap

Network

Block height
Hashrate
Difficulty
Block reward
Next subsidy
Annual issuance
Market cap

Supply

21 M minted
In circulation
To discover
Halving in
Stock-to-flow
BTC inflation
Strategy holds

Mempool & Fees

Unconfirmed tx
Mempool size
Fees waiting
Fast ~10 min
Medium ~30 min
Slow ~1 hr
Minimum

§ IIIIndex

complete reference · 21+8 articles · 8 providers · 299 services · 5 signals · 80 terms

A · Learn — §I (21 + 8)

B · Swap, Radar & Live — §II / IV / V

D · Glossary & the press

§ IVFrom the workshop

225 ships · last 6 shown · streaming

Built in the open: the finished work streams below — the raw drafts, notes and works-in-progress live next door at the Workshop · wip.youbuybitcoin.com ↗.

★ Featured

"A Builder's Redesign" — voicing the homepage, not just shipping it

A composite homepage drawn from eleven explorations: an almanac's reference depth with a live-dashboard's pulse. Dense, calm, signed — a posture statement about how an independent Bitcoin hub should feel.

Essay · 12 min
2026-05-20InfraGSC SEO cleanup & clean-URL deduplication bundle — legacy paths now 301 to clean URLs.68 redirects
2026-05-18InfraBuilding-in-Public page polish — last-ship time stays current, search shows alive.cache bump
2026-05-17DataVerification pipeline rebuilt — every push runs 6 quality gates in 2 s instead of 60.30× faster
2026-05-16LaunchWorkshop sister site launched at wip.youbuybitcoin.com — raw thinking, in the open.new surface
2026-05-12InfraFix mobile hamburger drawer doubling — nav destinations appearing twice.−1 line
2026-05-09ContentSelf-description drift swept across 7 surfaces — listings 275 → 299, identity now matches.7 files
Streaming · refreshes on every ship→ Full log · 225 entries